/Engine/Source/Editor/BlueprintGraph/Classes/K2Node_Variable.h
Replace any member references of source with replacement
virtual void ReplaceReferences ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * InBlueprint, [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * InReplacementBlueprint, const [FMemberReference](API\Runtime\Engine\Engine\FMemberReference) & InSource, const [FMemberReference](API\Runtime\Engine\Engine\FMemberReference) & InReplacement )